This video describes almost all main features of Graphing calculator App by Mathlab in Urdu language. This incredible App is available on Google Playstore for free:
https://play.google.com/store/apps/details?id=us.mathlab.android

Its PRO version can be downloaded by spending just $5.99.

A detailed review article about the app can be found here (in English):
http://graphing-calculator-mathlab.blogspot.com/

And for Urdu users, here:
http://graphing-calculator-mathlab-urdu.blogspot.com/

Thank you for your interest.